Improvement in road-scrapers



bien effin DAVID L. SnnrAnD, or roxnonouen, MASSACHUSETTS.

Letters Patent No. 109,768, dated November 29, 187B.

IMPROVEMENT IN RO'AD"SCRAPERS.

The Schedule referred to in these Letters Patent and making part ol' thesame.

To all whom it may concern:

Be it known that I, DAvID L'. SHEPARD, of Foxf borough, in the county ofNorfolk and State of Massachusetts,.have invented a Machine for Gradingand Scraping Roads, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawing making apart of this specification, in which- Figure l .is a perspective view,representing my machine for grading and scraping roads. Y

Figure 2 is a side elevation.

Figure 3, detail'to be referred to.

'To provide a convenient, expeditious, and economical means for makingaud grading new roads, and for scraping and smoothing over old roads tobe repaired, is the object of my invention, which consists in anorganized machine in which a scraper is employed for entering the groundand for guiding and disposing the material in proper quantities upon theroad at the several points to form the inclination required.

And my invention also consists in certain detailsof mechanism by whichthe scraper is'operated and ad'- justed to any inclination of gradedetermined on.

To enable others skillediu the art to understand and use my invention, Iwill proceed to describe the manner in which I have carried it out.

In the said drawingt A is the framework, therear end of which islsupported on the axle B of apar of wheels, O, while the front of theframe-work rests on a bifurcatedarimD,

through the lower end of which passes the axle E ofv` a single wheel, F,the arm being free to swivel v-o'r-re-l volve around within theframe-work, in 4order that the truck may turn short around. s vGr is thedraft pole o r tongue, secured to the front of the frame-work, but thepole or tongue may be directly secured to the arm D, so as vto enablethe truck to turn more positively.

His a scraper, of the form shown, that is to say, having the land-sideof suiiicient length to prevent itsl being thrown out of the direct lineof draft when in'operation, with the forward end tted to the point 6,and shaped as shown in g. 2,.and with its scraping surface suitably'curved above its cutting edge, 5, to

cause it to carry forward and remove the dirt.

This scraper is rigidly secured at its forward end to the beam l, whichbeamA is supported by a chain, a, secured at its upper end to ascrew-bolt passing through the frame-work.

The scraper, at or near its rear end, is rigidly secured to the brace Jof the beam I, and this brace is supported by` the rod b passing througha slotted lower edge, 5, may be inclined to any angle to conform to thegrade required; for instance, where a steep pitch is to be given the`road-bed the .rod b may be raised, and with it the rear portion of thescraper, by turning the screw-nut j, or the front portion ot' thescraper may be lowered by' turning the Vnut e, or both nuts may beoperated to perform this adjustment.

The 'upper forward ,end of the beam I is provided with a seriesofholesgi, and fits loosely-between the frame-.work and a plate, K, alsoprovided with holes, g, of a size corresponding to those in the forwardend of the beannby which construction the movements required in givingthe proper inclination to the edge 5 are free to be made,andthe point 6of the scraper may be raised or lowered bysimply changing the p0- sitionof a pin, h, whichk enters the holes i, and those in the forward end ofthe beam I.

lThe line from e', a little in the rear of the point 6, to the heel j ofthe scraper, is intended4 to be always keptin a horizontal plane, whichmay readily be done .byfmeans of the adjustments above described, and

this line, ordinarily termed the land-side, is of considerable length,so that an extended bearing surface lmaybe'provided to prevent, as faras possible, the

scrapel-f1'om being thrown out of the direct linc of This brake-'rod isconnected by a series of levers,

k l m n 0,1with a curved spring, N, fig. 3, one end oi' which is securedto al pin projecting from the framework, while the other end ofthespring .is allowed to Vslidefreely within a guide,.`p.

" lheobject of the spring and compound leverage is ,to enable theoperator at bis option to apply an elas tie or yielding pressure on thescraper, so to admit of it-slrising when it comes -in .contact withunyielding obstacles.

The plate c is slotted so as to allow the scraper to be moved-laterallyout and in by operating a shipperlever, O, for the purpose of grading orscraping a wider or narrower portion of the road, according to the willof the operator.

'lhe scraper may be instantly raised -from the ground when not in use bythe lever'P and to avoid contact with large stones o r other'obstructionswhen in use, the scraper can be raised by meansJ of thesame lever P, connected by a chain, q, with the beam I.

Claims.' What I claim as my invention, and desire to secure by LettersPatent, is

1; The scraper H, wheu attached to the beam I and brace J, :md adjustedby menus of the chain af,

Witness my mm1 this 25th myof April, A. D. rod brand piu 7:',in'oombnatiou substantially as set 1870. l

fovth. DAVID L. SHEPAR-D.

2. The branko-rod M, the connecting levers k l m n.0, and the spring N,in combnation wit-h the NVitnesses:

scraper H, substantallyas and for the purpose set N. W.. STEARNS,

forth.

L. E. BATCHELLER

